Door latch



llg- 9, 1932- H. w. RIGHTMYER 1,871,085

DOOR LATCH Filed June 23, 1951 Patented Aug. 9, 1932 UNITED STATES HOLDEN W. RIGHTMYER, OF TOLEDO, OHIO,

ASSIGNOR T0 THE AMERICAN SWISS COH- IPANY, 0F TOLEDO, OHIO, A CORPORATION OF OHIO Doon LATCH Application led June 23,

This invention relates to door latches, as for example automobile door latches and an object is to produce a simple and eiiieient door vlatch having the new and improved features of construction, arrangement and operation hereinafter described.

For purposes of illustration, an embodiment of the invention is shown on the accompanying drawing in which:

Y Figure 1 is a side elevation of a door latch; and Fig. 2 is a fragmentary view of an alternate form in which a lug is formed on the ull-to handle for engagement with the outer roll back arm. Y

The illustrated embodiment of the invention comprises a door latch having a back plate 1 provided with an outwardly bent flange 2 which is formed with an opening through which the nose 3 of the latch bolt 1 is movable. The latch bolt is normally held in projected or latching position by a spiral spring mounted on the back plate and for guiding the bolt a headed pin 5 fixed to the back plate projects through a longitudinally elongate slot 6 in the bolt plate. Assisting in guiding the latch bolt and holding it in spaced relation with respect to the back plate is a plate 7 which is mounted on the pin 5 and has aflanged rim 8 extending part way around the plate.

For retracting the latch bolt from the outside, a roll back 9 is mounted on the back plate and is held in place by a suitable cover plate 10 suitably secured to the back plate as by outwardly bent tabs 11. A spindle-receiving opening 12 is provided in the roll back hub to receive the usual handle-operated spindle shaft. Projecting at an angle from the roll back 9 and secured for movement therewith is an arm 13 having a nose 14a, the purpose of which will hereinafter appear.-

The latch bolt is retracted from the inside by a lever 14 which is pivoted at 15 to the back plate 1 and is provided with an upwardlv and inwardly inclined portion 16. The rear end ofthe bolt is flanged over at 17 at an angle corresponding to that of the bandle portion 17. The lever 14 is shown in its normal position in the drawing and it is apparent that movement of the lever to the l 1931. Serial No. 546,295.

A notch 18 is cut out of the lever 14 on the I side away from the iange 17 and provides an abutment 19. When the lever 14 is moved to the left from normal position, the abutment 19 engages the underside of the nose 14a thereby preventing the latch bolt from being retracted from the outside. Rocking -movement of the lever 14 tothe left of Fig. 1 is limited by the plate 7. As shown in Fig. 2 a lug 19a may be employed instead of the notch 18 and provide an abutment for blocking movement of the arm 13. It will be seen that successively upon movement of the lever 14 to the right the outside roll back 9 is released and subsequently the latch bolt is retracted.

A slidable plate 2O guided by pins 21 operated in an elongate slot 22 may be moved by a cam 23 to move the lever 14 out of roll back blocking position. This may be keycontrolled, if desired so that insertion of a suitable key and turningsame operates to release the outside roll back 9 to enable the door to be opened from the outside.

It is to be understood that changes'in details of construction, arrangement and operation may be effected without departing from the spirit of the invention as defined in the appended claims.

What I claim is:

1. A door latch comprisinga back plate. a tensioned latch bolt movable over said back plate, an outside operated roll back for retraeting said latch bolt, a flange on the outer portion of said latch bolt, a lever pivoted at one end to said back plate and normally disposed in substantially vertical position with a portion thereof lying close to said latch bolt, said lever being engageablewith said ilange for retracting said latch bolt, an arm fixed to and movable with said roll back, and an abutment on the side of said lever remote from said flange and adapted to be moved into the path of movement of said arm for blocking movement of said outside roll back.

2. A door latch comprising a back plate, a tensioned latch bolt movable over said back plate, an outside operated roll back for retracting said latch bolt, a down-turned flange on the outer portion of said latch bolt, a ullto lever pivoted at one end to said ack plate and normally disposed in substantially 5 vertical position with a portion thereof extending beneath said latch bolt, said lever being engageable withsaid flange for retract- 1 ing said latch bolt, an arm fixed to and mov- 'able with said roll back; and an abutment on the side of said lever remote from said ilange and adapted to be moved into the path -of movement of said arm for blocking movement of said outside roll back, al slide engageable with said lever and'adapted to move l5 same away from blocking position, and cam means operable from the outside for actuating said slide.

. In testimony whereof, I have hereunto signed my name to this specification. v HOLDEN W. RIGHTMYER. 

